<template>
  <div class="update-photo">
    <img class="img" :src="img" ref="img" />

    <div class="toolbar">
      <div class="cancel" @click="$emit('close')">取消</div>
      <div class="confirm" @click="onConfirm">完成</div>
    </div>
  </div>
</template>

<script>
import 'cropperjs/dist/cropper.css';
import Cropper from 'cropperjs';
import { updateUserPhoto } from '@/assets/api/user';

export default {
  props: {
    img: {
      type: [String, Object],
      required: true
    }
  },
  data() {
    return {
      cropper: {}
    };
  },
  created: function() {},
  mounted: function() {
    const image = this.$refs.img;
    this.cropper = new Cropper(image, {
      viewMode: 1,
      dragMode: 'move',
      aspectRatio: 1,
      // autoCropArea: 1,
      cropBoxMovable: false,
      cropBoxResizable: false,
      background: false
    });
  },
  methods: {
    /**
     * 确定按钮点击事件
     */
    onConfirm() {
      this.cropper.getCroppedCanvas().toBlob(blob => {
        this.updateUserPhoto(blob);
      });
    },
    async updateUserPhoto(blob) {
      this.$toast.loading({
        message: '保存中...',
        forbidClick: true, // 禁止背景点击
        duration: 0 // 持续展示
      });
      try {
        // 错误的用法
        // 如果接口要求 Content-Type 是 application/json
        // 则传递普通 JavaScript 对象
        // updateUserPhoto({
        //   photo: blob
        // })

        // 如果接口要求 Content-Type 是 multipart/form-data
        // 则你必须传递 FormData 对象
        const formData = new FormData();
        formData.append('photo', blob);

        const { data } = await updateUserPhoto(formData);

        // 关闭弹出层
        this.$emit('close');

        // 更新视图
        this.$emit('update-photo', data.data.photo);

        // 提示成功
        this.$toast.success('更新成功');
      } catch (err) {
        this.$toast.fail('更新失败');
      }
    }
  }
};
</script>

<style scoped lang="less">
.update-photo {
  background-color: #000;
  height: 100%;
  .toolbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-between;
    .cancel,
    .confirm {
      width: 90px;
      height: 90px;
      font-size: 30px;
      display: flex;
      justify-content: center;
      align-items: center;
      color: #fff;
    }
  }

  .img {
    display: block;
    max-width: 100%;
  }
}
</style>
